Hasan Mostafa

Hasan Mostafa (c. 1990-7 June 2016) was an Islamic State fighter and one of the attackers in the 2016 Riyadh embassy siege. He alerted Khaled al-Asiri to the escape of the US embassy staff as they headed towards al-Mafraq Stadium, and he was killed by the marines as they held off the terrorists while waiting for extraction.